Multilayered core-satellite nanoassemblies with fine-tunable broadband plasmon resonances

Wei Xiong; Debabrata Sikdar; Lim Wei Yap; Malin Premaratne; Xinyong Li; Wenlong Cheng

doi:10.1039/c4nr06756h

Multilayered core-satellite nanoassemblies with fine-tunable broadband plasmon resonances

Wei Xiong, Debabrata Sikdar, Lim Wei Yap, Malin Premaratne, Xinyong Li, Wenlong Cheng

Research output: Contribution to journal › Article › Research › peer-review

42 Citations (Scopus)

Abstract

We report on a robust nanotemplating approach to synthesize plasmonic multilayered core-satellite (MCS) nanoassemblies. Templated with gold nanorods, ultrathin Au/Ag alloy cages and satellite gold nanoparticles can be constructed sequentially by galvanic replacement reactions and electrostatic self-assembly, respectively, forming structurally well-defined MCS. The MCS nanoassemblies exhibit strong broadband plasmon resonances from 440 to 1100 nm, and their resonant features can be fine-tuned by adjusting the size and number density of satellite nanoparticles and by adjusting the thickness of the silica spacer between cage and satellite particles. Such fine-engineered MCS nanoassemblies enable precise programming of the strength and distribution of hot spots to maximize the overall enhancement of surface enhanced Raman scattering.

Original language	English
Pages (from-to)	3445 - 3452
Number of pages	8
Journal	Nanoscale
Volume	7
Issue number	8
DOIs	https://doi.org/10.1039/c4nr06756h
Publication status	Published - 2015

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title = "Multilayered core-satellite nanoassemblies with fine-tunable broadband plasmon resonances",

abstract = "We report on a robust nanotemplating approach to synthesize plasmonic multilayered core-satellite (MCS) nanoassemblies. Templated with gold nanorods, ultrathin Au/Ag alloy cages and satellite gold nanoparticles can be constructed sequentially by galvanic replacement reactions and electrostatic self-assembly, respectively, forming structurally well-defined MCS. The MCS nanoassemblies exhibit strong broadband plasmon resonances from 440 to 1100 nm, and their resonant features can be fine-tuned by adjusting the size and number density of satellite nanoparticles and by adjusting the thickness of the silica spacer between cage and satellite particles. Such fine-engineered MCS nanoassemblies enable precise programming of the strength and distribution of hot spots to maximize the overall enhancement of surface enhanced Raman scattering.",

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AU - Xiong, Wei

AU - Sikdar, Debabrata

AU - Yap, Lim Wei

AU - Premaratne, Malin

AU - Li, Xinyong

AU - Cheng, Wenlong

PY - 2015

Y1 - 2015

N2 - We report on a robust nanotemplating approach to synthesize plasmonic multilayered core-satellite (MCS) nanoassemblies. Templated with gold nanorods, ultrathin Au/Ag alloy cages and satellite gold nanoparticles can be constructed sequentially by galvanic replacement reactions and electrostatic self-assembly, respectively, forming structurally well-defined MCS. The MCS nanoassemblies exhibit strong broadband plasmon resonances from 440 to 1100 nm, and their resonant features can be fine-tuned by adjusting the size and number density of satellite nanoparticles and by adjusting the thickness of the silica spacer between cage and satellite particles. Such fine-engineered MCS nanoassemblies enable precise programming of the strength and distribution of hot spots to maximize the overall enhancement of surface enhanced Raman scattering.

AB - We report on a robust nanotemplating approach to synthesize plasmonic multilayered core-satellite (MCS) nanoassemblies. Templated with gold nanorods, ultrathin Au/Ag alloy cages and satellite gold nanoparticles can be constructed sequentially by galvanic replacement reactions and electrostatic self-assembly, respectively, forming structurally well-defined MCS. The MCS nanoassemblies exhibit strong broadband plasmon resonances from 440 to 1100 nm, and their resonant features can be fine-tuned by adjusting the size and number density of satellite nanoparticles and by adjusting the thickness of the silica spacer between cage and satellite particles. Such fine-engineered MCS nanoassemblies enable precise programming of the strength and distribution of hot spots to maximize the overall enhancement of surface enhanced Raman scattering.

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DO - 10.1039/c4nr06756h

M3 - Article

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VL - 7

SP - 3445

EP - 3452

JO - Nanoscale

JF - Nanoscale

IS - 8

ER -

Multilayered core-satellite nanoassemblies with fine-tunable broadband plasmon resonances

Abstract

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